R1121N SERIES LOW NOISE 150mA LDO REGULATOR NO.EA-058-111026 OUTLINE The R1121N Series are CMOS-based voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ON-resistance, and high Ripple Rejection. Each of these voltage regulator ICs consists of a voltage reference unit, an error amplifier, resistors, a current limit circuit, and a chip enable circuit. These ICs perform with low dropout voltage and a chip enable function. The line transient response and load transient response of the R1121N Series are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment. The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs is SOT-23-5 (Mini-mold) package , high density mounting of the ICs on boards is possible. FEATURES Supply Current ................................................................Typ. 35A Standby Mode .................................................................Typ. 0.1A Dropout Voltage ..............................................................Typ. 0.2V (IOUT=100mA) Ripple Rejection..............................................................Typ. 70dB(f=1kHz) Temperature-Drift Coefficient of Output Voltage .............Typ. 100ppm/C Line Regulation ...............................................................Typ. 0.05%/V Output Voltage Accuracy.................................................2.0% Output Voltage Range.....................................................1.5V to 5.0V (0.1V steps) (For other voltages, please refer to MARK INFORMATIONS.) Package ........................................................................SOT-23-5 (Mini-mold) Built-in chip enable circuit ( 2 types A: active L, B: active H) Pin-out.............................................................................Similar to the TK112,TK111 APPLICATIONS Power source for cellular phones such as GSM, CDMA and various kinds of PCSs. Power source for domestic appliances such as cameras, VCRs and camcorders. Power source for battery-powered equipment. 1 R1121N BLOCK DIAGRAM R1121Nxx1A R1121Nxx1B 3131 VDD VOUT VDD VOUT Vref Vref CE Current Limit GND CE Current Limit GND 4 2 4 2 SELECTION GUIDE The output voltage, the active type for the ICs can be selected at the user s request. Product Name Package Quantity per Reel Pb Free Halogen Free SOT-23-5 3,000 pcs Yes Yes R1121Nxx1-TR-FE xx : The output voltage can be designated in the range from 1.5V(15) to 5.0V(50) in 0.1V steps. (For other voltages, please refer to MARK INFORMATIONS.) : Designation of Active Type. (A) active (B) active 2